Novel hot extrusion tee joint forming process

A molding process and extrusion molding technology, applied in metal rolling and other directions, can solve the problems of complex manufacturing procedures, waste of time, waste of resources, etc., and achieve the effects of shortening the production cycle, saving fuel resources, and saving repeated heating.

Active Publication Date: 2013-11-20
BEIJING LONGSHINE OIL TUBULAR TECH
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Problems solved by technology

[0009] As mentioned above, the main procedures of the conventional hot extrusion tee forming process are: pipe making, hot flattening (increased deformation of the tee), pressing, extrusion flanging, rou

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[0037] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0038] Such as figure 2 A new type of hot extrusion tee molding process shown includes the following steps:

[0039] In the first step, steel plate rolling: the sheet steel plate is rolled into a shaped steel plate of a designed thickness, and the shaped steel plate is divided into three areas: the end area, the middle area and the tail area arranged in parallel according to the thickness, wherein the end The wall thickness of the middle region and the tail region are the same; the wall thickness of the middle region is greater than the wall thickness of the end region ...

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Abstract

A novel hot extrusion tee joint forming process comprises the following steps: Step one, rolling steel plates: a stamped steel plate is divided into three areas arranged in parallel according to the depth, namely an end part area, a middle part area and a tail part area; the wall thickness of the middle part area is greater than those of the end part area and the tail part area; smooth transition; Step two, molding and welding a steel tube, and manufacturing the steel tube: a thickening area is formed on the wall of the area where the middle part area is; Step three, trepanning, extruding and forming a tee joint workpiece: marking out a line and trepanning in the thickening area; Step four, shaping processing: heating to about 900 DEG C, heat preserving, and shaping. The novel hot extrusion tee joint forming process is optimized based on the conventional process, comparatively simpler, saves the steel tube flattening and bulging processes, greatly saves the product manufacturing time, and improves the working efficiency; when the flattening and bulging processes are saved, the manufacturing and molding time of a tee joint is greatly reduced, and the entire production cycle is substantially shortened.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas transportation equipment, in particular to a novel hot extrusion tee forming process. Background technique [0002] In the construction of long-distance oil and gas pipeline projects, in order to meet the needs of distribution, direction change, and metering, a large number of pipe fittings such as elbows and tees are often required for on-site construction of stations, valve rooms, and compressor stations. Among the various types of tees, extruded tees are widely used due to their unique advantages. The manufacture of extruded tees is based on the principle of metal plastic deformation, heating the material to the austenitic state, so that the tube blank metal produces plastic flow in the mold cavity. Its characteristic is that there is no weld seam in the transition area at the intersecting line of the main branch pipe, which is convenient for non-destructive testing, and its reliab...

Claims

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Application Information

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IPC IPC(8): B23P15/00B21B1/38
Inventor 刘迎来王高峰杨红兵王耀光王长安李记科聂向晖赵金兰
Owner BEIJING LONGSHINE OIL TUBULAR TECH
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